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Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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I have a 1985 Evinrude 120 that I just bought. The motor runs

Customer Question

I have a 1985 Evinrude 120 that I just bought. The motor runs rough at idle. I checked the compression and it was 91 on all 4 cylinders. Two of the plugs were wet with fuel. One was very wet. What do you think is the problem?
Submitted: 2 years ago.
Category: Boat
Customer: replied 2 years ago.
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Expert:  Tan replied 2 years ago.
Hello. My name is***** is most likely a spark issue. We need to do a spark test. This has to be done with a spark gap tester to determine if you have spark and the strength of the spark. You can get this type tester at an auto parts store. Post back with findings.
Customer: replied 2 years ago.
Ok, is 91 psi ok for a 1985 120 Evinrude?
Expert:  Tan replied 2 years ago.
Its on the low side but you are mostly interested in the difference between cylinders. They are close so the engine should run as it does run on 2 cylinder now..

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